Number of (n+1) X (3+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 4, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).

A235082

Number of (n+1) X (3+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 4, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).

Terms

    a(0) =202a(1) =418a(2) =830a(3) =1758a(4) =3610a(5) =7810a(6) =16390a(7) =36014a(8) =76770a(9) =170682a(10) =368326a(11) =826742a(12) =1802794a(13) =4080058a(14) =8981550a(15) =20478862a(16) =45484138a(17) =104423170a(18) =233911958a(19) =540447918a(20) =1220542066a(21) =2836640986a(22) =6456060310a(23) =15085064246a(24) =34583105082a(25) =81197167002

External references